Amazon.com: 2 pcs 7" (178mm) Coated Poly Dome Dust Cap for Subwoofer Speakers : Electronics
Order the Poly Speaker Dust Cap | 3" - SoundImports
2PCS 22-45MM PLASTIC Speaker Dome Dust Cap Bass Woofer Cover Bullet Repair Parts EUR 12,44 - PicClick FR
20mm/36mm/58/71mm/89/116/138/150mm 15/18/21 Inch Audio Speaker Parts Subwoofer Woofer Loudspeaker Car HiFi Paper PP Dust Cap Cover - China Woofer Speaker Dust Cap, 12V Speaker Spare Parts | Made-in-China.com
If the dust cover in the center of your bass driver (audio speaker) gets pushed in, how would you fix it? - Quora